4-speed trans
with the 76 date code, looks like you have an od unit
1975 thru 1987 Overdrive
1975 thru 1987 Overdrive
- 3.09:1
- 1.67:1
- 1.1:1
- 0.73:1 (Trucks used a 0.71:1 final drive)
"Chrysler's OD A-833 was introduced in 1975 to replace the standard A-833. With the energy crunch of the early 1970's in full swing, the performance oriented A-833 was laid to rest. The Overdrive four speed was basically a regular A-833 with an overdriven gear set installed in place of the regular third gear. The shift lever on the side cover was flipped over to "fool" the shifter into shifting from second to fourth and then back into third, which was the overdrive gear. The overdrive gear is very small and as a result, the mainshaft journal and splined hub is smaller. This results in a unit that it not quite as tough as the A-833, but in a medium horsepower street driven vehicle, it should prove to be a sufficient unit. You can swap OD 833 parts as a set into the correct case for the mainshaft. Ma Mopar never offered the OD A-833 behind a Big-Block, but it can be accomplished in a few different approaches. One alternative is if you are lucky enough to have a bellhousing that accepts the 4.80 bearing retainer. In this case, you could simply purchase a 4.80 diameter/3.70 bolt circle-bearing retainer designed for the 23-spline input transmission. (These can currently be purchased from Passon Performance. With this combination, it is a bolt-together swap. Unfortunately, 4.80 retainer diameter bellhousings aren't exactly falling out of the sky, but there is another alternative-Below are the steps needed to adapt the OD A-833 to a #2468372 casting, 4.35 diameter retainer bellhousing. Any full-service automotive machine shop should be able to perform these operations for you for well under $100.00."
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